Stereopticon.



C. C. CLEMENT.

STEREOPTICON.

APPLICATION FILED MAYIS, 191's.

1 ,21 8,928. Patented Mar. 13, 1917.

2 SHEETS-SHEET I CECIL C. CLEMENT, 0F SPOKANE,

orruon.

WASHINGTON, ASSIGNOR 0F ONE-HALF T0 HENRY B.

' KIN GSBURY, OF SPOKANE, WASHINGTON. v

STEREOPTICON.

Specification of Letters Patent.

Patented Mar. 13, 1917.

Application filed May 15, 1916. Serial No. 97,661.

To all whom it may concern: Be it known that I, CECIL C. CLEMENT, acitizen of the United States, residing at Spokane, in the county ofSpokane and State of IVashington, have invented certain new and usefulImprovements in Stereopticons, of which the following is aspecification.

This invention relates to new and useful improvements in stereopticonsand the principal object is to provide a fade-out stereopticon for useparticularly as an advertising medium and for exhibiting views inrotation; A further object resides in providing a device of thischaracter which may be used for other purposes as may be found desirableand which will be particularly advanta geous in school rooms and otherseats of learning.

A still further object resides in providing a device which is simple anddurable in construction, inexpensive to manufacture and one which willbe very eiiicient and useful in operation.

With these and other objects in view, my invention consists in the novelfeatures of construction, combination and arrangement of parts, as willbe hereinafter referred to and more particularly pointed out in thespecification and claims.

In the accompanying drawings, forming a part of this application Figure1 is a vertical section through a device constructed in accordance withmy invention;

Fig. 2 is a horizontal section therethrough;

Fig. 3 is an enlarged vertical section through the device showing inelevation the picture wheels and the means for operating same; and

Fig. 4c is an elevation showing the shutter arrangement in connectionwith the picture wheels.

In describing the invention, I shall refer to the drawings in whichsimilar reference characters designate corresponding parts throughoutthe several views and in which 1 indicates a casing of substantiallyrectangular design mounted on the adjustable legs 2 and the forward endof said casing is provided with a clear glass 3 which is disposed at anangle inwardly from its lower to its upper edge whereby to kill shadowsthat would ordinarily be evident, were the glass perpendicularly.Disposed imme diately in the rear of the glass 3 is a ground glass orscreen a upon which the pictures are projected and mounted on a bracketor base 5 about midway of the base of the easing 1 are the adjustablelenses 6 arranged in duplicate. These lenses aredesigned'for the purposeof focusing the pictures upon the screen or glass 4. and in the extremerear wall 7 of the casing is an electric lamp 8 sup porting a reflector9. The lamp and reflector are also arranged in duplicate, as shown inFig. 2 of the drawings and the light rays from the lamps 8 are projectedthrough a pair of condensing lenses 10 provided at the forward ends of apair of frusto-conical light receiving chambers 11.

Interposed between the focusing lenses and the condensing lenses is themechanism for operating the device which consists of a bracket orsupporting base 12 which supports one end of a pair of rods 12, theopposite ends of said rods being supported respectively in bearings 13on the light receiving chambers 11. Mounted on each of the rods 12,which are rotatable, is a picture wheel 14 which is provided to supportpictures which consist of negatives or prefably positives taken fromnegatives, which may be colored as desired. Mounted on the upper portionof the casing l is a box-like auxiliary casing 15 which supports aspring or other motor 16, the latterhaving a drive shaft carrying a gear17. The latter gear is adapted to mesh with a gear 18 carried on thestub shaft 19. Mounted on the shafts 12 carrying the picture wheels 14are star wheels20 which are adapted to be engaged by a pin 21 carried onone face of the gear 19, as clearly shown in Fig. 3 of the drawings.Itis obvious that the picture wheels may be rotated upon the rotation ofthe gear 18 and each picture wheel moves sufliciently each turn of thestar wheel to permit another picture to be displayed therefrom. In orderto obtain the fade-out and the fade-in feature of the device, anadditional shaft 22 is rotatably mounted in the bracket or support 12which carries a pinion 23, the latter meshing with the gear 18. Alsocarried by the shaft 22 is a shutter 24 which rotates with the shaft 22upon the rotation of the gear 18 and in revolving, said shutter willgradually cut off the light rays passing through one picture andgradually open alOQ path for the light rays of the opposite set to passthrough the picture being exposed in that set.

The above apparatus is particularly adapted as a stereopticon in whichpicture Wheels may be obtained and introduced into the machine bearingany desired types of pictures. The same may be used as an advertisingmedium and may be equally well used for showing processes of amanufacture, step by step, or the device may be used for any purposewherein the projection of pictures upon a screen is desired.

From the foregoing it will be seen that I have provided a simple,inexpensive and efficient means for carrying out the objects of theinvention, and while I have particularly described the elements bestadapted to perform the functions set forth, it is obvious that variouschanges in the form, proportion, and in the minor details ofconstruction may be resorted to, without departing from the spirit orsacrificing any of the principles of the invention.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. In a device of the class described, a casing, ascreen arranged at one end thereof, lamps arranged at the opposite endsof the same, a pair of adjustable lenses provided intermediate of theends of the casing, light receiving chambers arranged in duplicateadjacent the lamps, condensing lenses mounted in the forward ends ofsaid light receiving chambers, a pair of picture wheels rotatablymounted in overlapping relation to one another intermediate thecondensing and adjustable lenses, and a rotatable shutter operated uponthe rotation of said wheels to fade-out the picture in one wheel andfade-in the picture of the other wheel.

2. In a device of the class described, a casing, a screen arranged atone end thereof, lamps arranged at the opposite ends of the same, a pairof. adjustable lenses provided intermediate of the ends of the casing,light 7 receiving chambers arranged in duplicate adjacent the lamps,mounted in the forward recelvmg chambers, a

condensing lenses ends of said light pair of rotatable Copies of thispatent may be obtained for five cents each, by addressing the shafts ar'anged longitudinally of the casing, a pair of picture wheels carried bysaid shafts and arranged in overlapping relation for disposition betweenthe condensing and adjustable lenses, star wheels carried by saidshafts, a central rotating means adapted for alternate engagement withsaid star wheels to alternately operate said picture wheels and ashutter rotatable upon the operation of said central rotating meanswhereby to fade-out the picture in one wheel and fade-in the picture inthe other wheel.

3. In a device of the class described, a casing, a screen arranged atone end thereof, lamps arranged at the opposite ends of the same, a pairof adjustable lenses provided intermediate of the ends of the casing,light receiving chambers arranged in duplicate adjacent the lamps,condensing lenses mounted in the forward ends of said light receivingchambers, of a pair of rotatable shafts arranged longitudinally of thecasing, a pair of picture wheels carried by said shafts and arranged inoverlapping relation for disposition between the condensing andadjustable lenses, star wheels carried by said shafts, a centralrotating gear carrying a laterally extending pin adapted for engagementalternately with said star wheels to alternately rotate said picturewheels, means for rotating said gear, an additional shaft havingconnection with the aforesaid gear for rotation therewith, and a shuttercarried by the latter shaft for rotation therewith to fade-out onepicture and fade-in the other.

4. In a device of the class ing arranged on an adjustable support andprovided at its one end with a clear glass inclined inwardly from itsupper to its lower edge, a ground glass arranged perpendicularly in thecasing immediately in the rear of the aforesaid clear glass and designedto form a screen therein, lamps arranged at the rear of the casing,condensing lenses disposed forwardly of said lamps, adjustable focusinglenses disposed between the condensing lenses and said screen androtating picture wheels interposed between said lenses in the path ofthe light rays.

In testimony whereof I afiix my signature.

CECIL C. CLEMENT.

"Commissioner of Patents,

Washington, D. G.

described, a cas

